Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Reexamination Certificate
2005-06-07
2005-06-07
Fuqua, Shawntina (Department: 3742)
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
C219S390000, C219S405000, C392S416000, C392S418000, C118S724000, C118S725000, C266S217000, C266S249000, C266S250000, C266S266000, C266S270000
Reexamination Certificate
active
06903306
ABSTRACT:
A furnace for heat treating of metal parts includes a hot zone enclosure defining a hot zone therein. The hot zone enclosure has a side wall, a first end wall, and a second end wall. The side wall has slots formed therethrough and along the length thereof. The heat treating furnace also includes a system for injecting a cooling gas into the hot zone through the hot zone enclosure. The heat treating furnace further includes a damper arrangement for directing the cooling gas over a selected portion or portions of the workpiece load and through one or more of the slots. In one embodiment of the invention, all actuated components in the furnace are located outside of the hot zone to minimize damage to moving parts that are caused by exposure to extreme heat.
REFERENCES:
patent: 2734738 (1956-02-01), Even
patent: 4285504 (1981-08-01), Colvin
patent: 4610435 (1986-09-01), Pfau et al.
patent: 6533991 (2003-03-01), Moller
patent: 2002/0195439 (2002-12-01), Moller
Technical data. Seco/Warwick, Jun. 2001.
Technical data, Abar Ipsen.
Technical data, VFS, Sep. 1998.
Dann Dorfman Herrell and Skillman, P.C.
Fuqua Shawntina
Ipsen International, Inc.
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